Hey Claire, welcome to the board and all that folderol
I am curious though as to why you think that the junk rig is even half way decent to windward ?
Well, what I've read on the junk rig noted that it was unique for having the ability to sail into the wind. But what I read was kind of historical, so perhaps it was comparing it to western sails of the 17th and 18th century?
I'm afraid I know very little about sails, so my frame of reference is limited. Please educate me if you feel so inclined